Mechanical pencil



Dec. 26, 1939.

L. J. MOST MECHANICAL PENCIL Filed June 14, 1939 INVENTOR La] 11454:.-

RNEY

Patented Dec. 26, 1939 res 2,184,884 imcnsmcsr. mm. Lucifer it. Most, Hudson'Oounty, N. .1. ApnlicationJune 14, 1939, Serial No. 2.19.012

4 Claims. l20-l8) the magazine into the guide 9 when'another lead:

My invention relatesto mechanical pencils of the type in which the lead is an instrumentality of the pencil mechanism.

The object of the invention is to supply a simple mechanism formed of few moving parts, for propelling, retracting, expelling and automatically presenting a new lead to writing position.

Another object'of the invention is to provide leads that will interlock in the means for direct-- ly feeding the lead.

In the appended drawing forming part of this application, Figure 1 is a fragmentary vertical section of a pencil embodying my invention on line l l, Figure 2.

Figure 2 is an enlarged cross-section on line 2-2, Figure 1, and

Figure 3 is a bodying' my invention.

Referring to the drawing, 5 is a barrel, which 90 is provided with a customary tip 6 terminating at the lead outlet, with a threaded bore I. Positioned within the barrel and revolving relatively thereto is a magazine 8 having a lead guide 9 of angular cross-section extending through the cir- U cular borev ID of the tip threaded bore 1.

. The magazine is provided with an outer bead '2 bearing against a ring ll secured wi the barrel and'with the bearing of the end of the lead guide 9 on the bottom of the bore 10, the megazine is prevented from longitudinal displacement in the barrel. The magazine Icarries an eraser t3. and a cap I by which the magazine-may be cil are prismatic in'shape,

Each ofthe leads has its'ends cutona perspective view of a lead em-' and leading to the the threaded l5 will enter into the guide 9 'followingthe lead which is already in the guide. It the two slopes l6 of the contacting leads do not meet proper- 1y at the time they will travel that way toward 5 bore 1 until the lower lead lipesses substantially into the threaded bore 1 when it will remain stationary, while the lead above it will be turned by the guide -9 which turns with the magazine. This brings the slope I6 thereof in 10 register with the upper slope l6 .of the lower lead positioned in the threaded bore 1 of the tip, as shown in Figure 1. Inconsequence of this (angagement, the lower portion of the lead llwill turned in the barrel. The leads I! for the pen-,

' .that is to say, forming slopes It which are sum "angle with the axis of the prism, the two slopu other. when a lead is fed through the threaded bore 1 of the tip by the turning lying in planes substantially parallel to each of the m, the upper end ofslope I of a lead llpasseg from turn when the upper lead I! above it is turned by 15 the magazine through the guide 9. This engagement of the contacting slopes of the leads insures the expulsion of the lead section engaged in thethreaded bore 1. J 4

Although the description anddrawing refer to 90 a threaded tip mechanism, it is obvious that a threaded member may be located at any other portion inthe'barrel or tip using the leads described, that is, a lead having the ends cut-ml a bias.

I claim: a 1. Ina mechanical pencil, a magazine for leads, a tip'revoluble relatively to the-magazine but .prevented from moving longitudinally thereof, a guide from said magazine of angular cross-sep- 80 tion, and'a plurality of prismatic leads; each of similar cross-section as the guide, and each having its ends cut on a'bias, said tip having means for "a threaded engagement'with the leads passing thro h the guide.

2. In .a, mechanical pencil, aprlsmatic lead having its ends cut on a bias. 3. A prismatic lead for 'a mechanical pencil havingits ends cut obliquely to the axis .of the prism and substantially parallel to each other.

A." A prismatic/lead for mechanical'pencil. having sloping e s lying in substantially 

